/**
 * Copyright (c) 2006-2015, JGraph Ltd
 * Copyright (c) 2006-2015, Gaudenz Alder
 */
/**
 * Class: mxDefaultToolbarCodec
 *
 * Custom codec for configuring <mxDefaultToolbar>s. This class is created
 * and registered dynamically at load time and used implicitely via
 * <mxCodec> and the <mxCodecRegistry>. This codec only reads configuration
 * data for existing toolbars handlers, it does not encode or create toolbars.
 */
var mxDefaultToolbarCodec = mxCodecRegistry.register(
  (function () {
    var codec = new mxObjectCodec(new mxDefaultToolbar());

    /**
     * Function: encode
     *
     * Returns null.
     */
    codec.encode = function (enc, obj) {
      return null;
    };

    /**
     * Function: decode
     *
     * Reads a sequence of the following child nodes
     * and attributes:
     *
     * Child Nodes:
     *
     * add - Adds a new item to the toolbar. See below for attributes.
     * separator - Adds a vertical separator. No attributes.
     * hr - Adds a horizontal separator. No attributes.
     * br - Adds a linefeed. No attributes.
     *
     * Attributes:
     *
     * as - Resource key for the label.
     * action - Name of the action to execute in enclosing editor.
     * mode - Modename (see below).
     * template - Template name for cell insertion.
     * style - Optional style to override the template style.
     * icon - Icon (relative/absolute URL).
     * pressedIcon - Optional icon for pressed state (relative/absolute URL).
     * id - Optional ID to be used for the created DOM element.
     * toggle - Optional 0 or 1 to disable toggling of the element. Default is
     * 1 (true).
     *
     * The action, mode and template attributes are mutually exclusive. The
     * style can only be used with the template attribute. The add node may
     * contain another sequence of add nodes with as and action attributes
     * to create a combo box in the toolbar. If the icon is specified then
     * a list of the child node is expected to have its template attribute
     * set and the action is ignored instead.
     *
     * Nodes with a specified template may define a function to be used for
     * inserting the cloned template into the graph. Here is an example of such
     * a node:
     *
     * (code)
     * <add as="Swimlane" template="swimlane" icon="images/swimlane.gif"><![CDATA[
     *   function (editor, cell, evt, targetCell)
     *   {
     *     var pt = mxUtils.convertPoint(
     *       editor.graph.container, mxEvent.getClientX(evt),
     *         mxEvent.getClientY(evt));
     *     return editor.addVertex(targetCell, cell, pt.x, pt.y);
     *   }
     * ]]></add>
     * (end)
     *
     * In the above function, editor is the enclosing <mxEditor> instance, cell
     * is the clone of the template, evt is the mouse event that represents the
     * drop and targetCell is the cell under the mousepointer where the drop
     * occurred. The targetCell is retrieved using <mxGraph.getCellAt>.
     *
     * Futhermore, nodes with the mode attribute may define a function to
     * be executed upon selection of the respective toolbar icon. In the
     * example below, the default edge style is set when this specific
     * connect-mode is activated:
     *
     * (code)
     * <add as="connect" mode="connect"><![CDATA[
     *   function (editor)
     *   {
     *     if (editor.defaultEdge != null)
     *     {
     *       editor.defaultEdge.style = 'straightEdge';
     *     }
     *   }
     * ]]></add>
     * (end)
     *
     * Both functions require <mxDefaultToolbarCodec.allowEval> to be set to true.
     *
     * Modes:
     *
     * select - Left mouse button used for rubberband- & cell-selection.
     * connect - Allows connecting vertices by inserting new edges.
     * pan - Disables selection and switches to panning on the left button.
     *
     * Example:
     *
     * To add items to the toolbar:
     *
     * (code)
     * <mxDefaultToolbar as="toolbar">
     *   <add as="save" action="save" icon="images/save.gif"/>
     *   <br/><hr/>
     *   <add as="select" mode="select" icon="images/select.gif"/>
     *   <add as="connect" mode="connect" icon="images/connect.gif"/>
     * </mxDefaultToolbar>
     * (end)
     */
    codec.decode = function (dec, node, into) {
      if (into != null) {
        var editor = into.editor;
        node = node.firstChild;

        while (node != null) {
          if (node.nodeType == mxConstants.NODETYPE_ELEMENT) {
            if (!this.processInclude(dec, node, into)) {
              if (node.nodeName == "separator") {
                into.addSeparator();
              } else if (node.nodeName == "br") {
                into.toolbar.addBreak();
              } else if (node.nodeName == "hr") {
                into.toolbar.addLine();
              } else if (node.nodeName == "add") {
                var as = node.getAttribute("as");
                as = mxResources.get(as) || as;
                var icon = node.getAttribute("icon");
                var pressedIcon = node.getAttribute("pressedIcon");
                var action = node.getAttribute("action");
                var mode = node.getAttribute("mode");
                var template = node.getAttribute("template");
                var toggle = node.getAttribute("toggle") != "0";
                var text = mxUtils.getTextContent(node);
                var elt = null;

                if (action != null) {
                  elt = into.addItem(as, icon, action, pressedIcon);
                } else if (mode != null) {
                  var funct = mxDefaultToolbarCodec.allowEval
                    ? mxUtils.eval(text)
                    : null;
                  elt = into.addMode(as, icon, mode, pressedIcon, funct);
                } else if (
                  template != null ||
                  (text != null && text.length > 0)
                ) {
                  var cell = editor.templates[template];
                  var style = node.getAttribute("style");

                  if (cell != null && style != null) {
                    cell = editor.graph.cloneCell(cell);
                    cell.setStyle(style);
                  }

                  var insertFunction = null;

                  if (
                    text != null &&
                    text.length > 0 &&
                    mxDefaultToolbarCodec.allowEval
                  ) {
                    insertFunction = mxUtils.eval(text);
                  }

                  elt = into.addPrototype(
                    as,
                    icon,
                    cell,
                    pressedIcon,
                    insertFunction,
                    toggle
                  );
                } else {
                  var children = mxUtils.getChildNodes(node);

                  if (children.length > 0) {
                    if (icon == null) {
                      var combo = into.addActionCombo(as);

                      for (var i = 0; i < children.length; i++) {
                        var child = children[i];

                        if (child.nodeName == "separator") {
                          into.addOption(combo, "---");
                        } else if (child.nodeName == "add") {
                          var lab = child.getAttribute("as");
                          var act = child.getAttribute("action");
                          into.addActionOption(combo, lab, act);
                        }
                      }
                    } else {
                      var select = null;
                      var create = function () {
                        var template = editor.templates[select.value];

                        if (template != null) {
                          var clone = template.clone();
                          var style =
                            select.options[select.selectedIndex].cellStyle;

                          if (style != null) {
                            clone.setStyle(style);
                          }

                          return clone;
                        } else {
                          mxLog.warn("Template " + template + " not found");
                        }

                        return null;
                      };

                      var img = into.addPrototype(
                        as,
                        icon,
                        create,
                        null,
                        null,
                        toggle
                      );
                      select = into.addCombo();

                      // Selects the toolbar icon if a selection change
                      // is made in the corresponding combobox.
                      mxEvent.addListener(select, "change", function () {
                        into.toolbar.selectMode(img, function (evt) {
                          var pt = mxUtils.convertPoint(
                            editor.graph.container,
                            mxEvent.getClientX(evt),
                            mxEvent.getClientY(evt)
                          );

                          return editor.addVertex(null, funct(), pt.x, pt.y);
                        });

                        into.toolbar.noReset = false;
                      });

                      // Adds the entries to the combobox
                      for (var i = 0; i < children.length; i++) {
                        var child = children[i];

                        if (child.nodeName == "separator") {
                          into.addOption(select, "---");
                        } else if (child.nodeName == "add") {
                          var lab = child.getAttribute("as");
                          var tmp = child.getAttribute("template");
                          var option = into.addOption(
                            select,
                            lab,
                            tmp || template
                          );
                          option.cellStyle = child.getAttribute("style");
                        }
                      }
                    }
                  }
                }

                // Assigns an ID to the created element to access it later.
                if (elt != null) {
                  var id = node.getAttribute("id");

                  if (id != null && id.length > 0) {
                    elt.setAttribute("id", id);
                  }
                }
              }
            }
          }

          node = node.nextSibling;
        }
      }

      return into;
    };

    // Returns the codec into the registry
    return codec;
  })()
);

/**
 * Variable: allowEval
 *
 * Static global switch that specifies if the use of eval is allowed for
 * evaluating text content. Default is true. Set this to false if stylesheets
 * may contain user input
 */
mxDefaultToolbarCodec.allowEval = true;
